A modular multi-size bearing fault diagnosis experimental device

Abstract

This utility model discloses a modular multi-size bearing fault diagnosis experimental device, belonging to the field of bearing fault diagnosis experimental technology. It includes a base, a stepped shaft, a variable shaft diameter bearing seat device, and an acceleration sensor. The base has a linear groove parallel to the stepped shaft and multiple experimental positions, each equipped with an electromagnet. The variable shaft diameter bearing seat device includes a base fixed seat slidably mounted in the groove and detachable experimental components. The experimental components include a bore sleeve adapted to different shaft sections of the stepped shaft and an experimental bearing. The electromagnet, when energized, attracts the base fixed seat for rapid positioning, and the acceleration sensor directly contacts the outer wall of the bore sleeve to collect vibration signals. This device, through its rail-electromagnetic adsorption positioning and modular bore sleeve design, solves the problem of multi-level adaptation and rapid clamping positioning of stepped shafts, significantly improving experimental efficiency and diagnostic accuracy.

Description

Technical Field

[0001] This utility model relates to the field of bearing fault diagnosis experimental technology, specifically to a modular fault diagnosis experimental device that can be adapted to bearings of multiple specifications. Background Technology

[0002] As a core component of rotating machinery, the health of bearings directly affects the reliability and efficiency of equipment operation. Current bearing fault diagnosis experimental devices suffer from the following problems: Existing devices mostly employ a straight shaft structure, which is incompatible with stepped shafts widely used in the machinery industry. This makes axial positioning of the bearing housing difficult, relying on screws or set screws for fixation, resulting in cumbersome and inefficient operation. The mainstream solution uses screw clamping, which makes it difficult to ensure the coaxiality of the bearing and shaft, easily leading to circumferential slippage of the bearing. Furthermore, the screw tightening force lacks quantitative feedback, making it impossible for operators to determine whether the fixation is in place, increasing the difficulty and time cost of debugging. Existing devices struggle to quickly adapt to bearings of different sizes, especially for multi-stage stepped shaft sections, lacking a flexible, modular structure that limits the compatibility and efficiency of experiments. Utility Model Content

[0003] The present invention provides a modular multi-size bearing fault diagnosis experimental device, which is suitable for the rapid clamping and positioning of bearings of different sizes.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] A modular multi-size bearing fault diagnosis experimental device includes a base, an acceleration sensor, a stepped shaft, and a variable shaft diameter bearing housing device, wherein the stepped shaft is mounted on the base via the bearing housing;

[0006] The base is provided with a straight slide groove parallel to the stepped axis, and a plurality of experimental positions distributed along the axial direction of the stepped axis. Each experimental position corresponds to a stepped section of the stepped axis and is provided with an electromagnet.

[0007] The variable shaft diameter bearing seat device includes a base fixing seat and multiple experimental components. The base fixing seat is slidably installed on the linear slide groove and is provided with a pressure plate. When the electromagnet is energized, it attracts the base fixing seat, causing the pressure plate to press against the platform surface of the base.

[0008] The experimental assembly includes a bore sleeve for fixed installation on the base mounting base and experimental bearings installed therein, with the dimensions of each experimental bearing adapted to the corresponding stepped shaft segment.

[0009] The base fixture can be positioned at any experimental position and the corresponding experimental components can be installed to support the corresponding shaft segment of the stepped shaft. The acceleration sensor is installed on the base fixture, and its detection end contacts the outer circumferential wall of the aperture sleeve.

[0010] Furthermore, the base fixing seat is provided with several slots axially around its through hole, and the outer periphery of the hole sleeve is provided with protrusions that correspond one-to-one with the slots, which limit the position by snap-fit.

[0011] Furthermore, the base fixing seat is connected to a detachable clamping plate by a latch, and the inner side of the clamping plate is provided with an elastic protrusion for pressing the protrusion of the aperture sleeve into the slot.

[0012] Furthermore, the bore sleeve is provided with a set screw in the radial direction for locking the outer ring of the experimental bearing.

[0013] Furthermore, the stepped shaft is connected to the output shaft of the variable frequency motor mounted on the base via a coupling.

[0014] Furthermore, the stepped shaft is equipped with pulleys and gears for connecting to an external torque transmission system to simulate variable load conditions.

[0015] Furthermore, the stepped bushing has a first bushing for constraining the axial movement of the experimental bearing and gear.

[0016] Furthermore, the stepped bushing has a second bushing for constraining the axial movement of the bearing in the bearing housing and the pulley.

[0017] Furthermore, the base plate is detachably connected to the bottom of the platform, and the electromagnet is detachably connected to the base plate.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] It allows for rapid replacement of experimental bearings of different sizes, and achieves rapid positioning through the cooperation of linear slides and electromagnets, satisfying the needs of rapid clamping and positioning of bearings of various specifications. Based on the collaborative positioning system of linear slides and electromagnets, the base fixing seat can move along the linear slide of the base to the target experimental position, and then the electromagnet is energized to attract and fix it instantly, solving the problem of precise positioning of multi-stage shaft segments of stepped shafts, and the operation time is short. The size and layout of the electromagnets are designed entirely according to the design of stepped shafts, that is, one electromagnet corresponds to one stepped shaft segment, ensuring precise positioning and realizing a modular fault diagnosis experimental device that can be adapted to bearings of various specifications.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, embodiments of this utility model are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the modular multi-size bearing fault diagnosis experimental device described in the embodiment;

[0023] Figure 2 This is a first cross-sectional view of the modular multi-size bearing fault diagnosis experimental device described in the embodiment.

[0024] Figure 3 This is a second cross-sectional view of the modular multi-size bearing fault diagnosis experimental device described in the embodiment;

[0025] Figure 4 This is a structural diagram of the variable shaft diameter bearing housing device described in the embodiment;

[0026] Figure 5 This is a three-dimensional structural diagram of the modular multi-size bearing fault diagnosis experimental device described in the embodiment. At this point, the position of the variable shaft diameter bearing housing device and the stepped position of the stepped shaft supported by the variable shaft diameter bearing housing device relative to... Figure 1 The difference is that the variable shaft diameter bearing housing device has been replaced with a corresponding size bore sleeve to accommodate a smaller experimental bearing.

[0027] In the diagram: 01, Variable frequency motor; 02, Coupling; 03, Stepped shaft; 04, Bearing housing; 05, Experimental bearing; 06, Pulley; 07, Gear; 08, Variable shaft diameter bearing housing device; 09, Accelerometer; 10, Electromagnet; 11, Base; 111, Linear slide; 12, Base plate; 13, First bushing; 14, Set screw; 15, Second bushing; 0801, Pressure plate; 0802, Hole sleeve; 0803, Foundation fixing seat; 080301, Pressure plate part; 0804, Lock. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0029] Please refer to Figure 1 , Figure 2 and Figure 3This embodiment provides a modular multi-size bearing fault diagnosis experimental device, including a base 11, an acceleration sensor 09, a stepped shaft 03, and a variable shaft diameter bearing seat device 08.

[0030] The stepped shaft 03 is mounted on the base 11 via bearing housing 04 and variable shaft diameter bearing housing device 08. One end of the stepped shaft 03 is connected to the output shaft of the variable frequency motor 01 mounted on the base 11 via coupling 02. The variable shaft diameter bearing housing device 08 is located at the other end of the stepped shaft 03. The stepped shaft 03 is equipped with pulley 06 and gear 07 for connecting to an external torque transmission system to simulate variable load conditions, providing the basic conditions for variable load experimental design.

[0031] The bearing inside bearing housing 04 is installed in the shaft hole of bearing housing 04 with a light interference fit, and is locked with radially arranged locking bolts to ensure that the bearing does not slip axially. The stepped shaft 03 is fitted with a second bushing 15 to restrain the axial movement of the bearing in bearing housing 04 and pulley 06.

[0032] like Figure 3 As shown, the base 11 has a linear groove 111 parallel to the stepped shaft 03, and multiple experimental positions distributed along the axial direction of the stepped shaft 03. Each experimental position corresponds to a stepped shaft segment of the stepped shaft 03 and is equipped with an electromagnet 10. The variable shaft diameter bearing seat device 08 includes a base fixing seat 0803 and multiple experimental components. The base fixing seat 0803 is slidably installed in the linear groove 111 and is provided with a pressure plate 080301. When the electromagnet 10 is energized, it attracts the base fixing seat 0803, causing the pressure plate 080301 to press against the table surface of the base 11. The large-area pressing contact between the pressure plate 080301 and the table surface can improve the stability of the base fixing seat 0803. The bottom of the base 11 is detachably connected to the base plate 12 by bolts, and the electromagnet 10 is detachably connected to the base plate 12 by bolts.

[0033] The experimental components include a bore sleeve 0802 for fixed installation on the base mounting 0803 and an experimental bearing 05 installed therein, the size of each experimental bearing 05 being adapted to the corresponding stepped shaft segment; the stepped shaft 03 is fitted with a first bushing 13 for constraining the axial movement of the experimental bearing 05 and the gear 07.

[0034] The base fixture 0803 can be positioned at any experimental position and the corresponding experimental components can be installed to support the corresponding shaft segment of the stepped shaft 03. The acceleration sensor 09 is installed in the sensor mounting slot of the base fixture 0803, and its detection end is glued to the outer circumferential wall of the aperture sleeve 0802 with special adhesive to collect vibration signals.

[0035] The length, number, and spacing of the electromagnets 10 are designed according to the specifications of the stepped shaft 03. In this embodiment, three electromagnets 10 are provided to adapt to the three experimental positions of the base fixture 0803, that is, to adapt to the size of the three types of experimental bearings 05 and the length of the stepped shaft 03. When the corresponding electromagnet 10 below the base fixture 0803 is energized, it generates an attraction force, causing the base fixture 0803 to form a surface contact and fixation with the base 11. The bottom of the base fixture 0803 is also firmly attracted to the electromagnet 10, thus achieving positioning.

[0036] In this embodiment, as Figure 4 As shown, the base fixing seat 0803 has three slots axially around its through hole, and the outer circumference of the bore sleeve 0802 has three protrusions corresponding to the three slots, which are limited by a snap-fit ​​mechanism. The base fixing seat 0803 is connected to a detachable clamping plate 0801 via a latch 0804. The inner side of the clamping plate 0801 has three elastic protrusions, which are used to press the protrusions of the bore sleeve 0802 into the corresponding slots. The elastic protrusions can be made of rubber or other elastic materials. This structural design of the bore sleeve 0802 prevents its rotation. When the clamping plate 0801 is closed, it is locked by the latch 0804. At this time, the clamping plate 0801 presses down on the bore sleeve 0802, restricting its axial movement. The bore sleeve 0802 has a set screw 14 radially for locking the outer ring of the experimental bearing 05.

[0037] If fault diagnosis experiments on bearings of different sizes are required, the position of the variable shaft diameter bearing housing device 08 needs to be changed, the stepped shaft sections supporting the stepped shaft 03 need to be modified at different positions, and the variable shaft diameter bearing housing device 08 needs to be replaced with a corresponding diameter sleeve 0802 to accommodate the corresponding size experimental bearing 05. To further explain the compatibility of the variable shaft diameter bearing housing device 08 with multiple bearing outer diameter specifications, we provide... Figure 5 Example, with Figure 1 The difference is that the variable shaft diameter bearing housing device 08 is adapted to the experimental bearing 05 with a smaller shaft diameter. The variable shaft diameter bearing housing device 08 has a smaller hole diameter sleeve 0802 installed inside. The experimental bearing 05 is installed at the end of the stepped shaft 03. The base fixing seat 0803 also slides to the end of the base 11 and is fixed by being attracted by the electromagnet 10 at the outermost end.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modular multi-size bearing fault diagnosis experimental device, comprising a base (11), an acceleration sensor (09), a stepped shaft (03), and a variable shaft diameter bearing seat device (08), wherein the stepped shaft (03) is mounted on the base (11) via a bearing seat (04), characterized in that, The base (11) is provided with a straight slide (111) parallel to the stepped shaft (03) and a plurality of experimental positions distributed along the axial direction of the stepped shaft (03). Each experimental position corresponds to a stepped shaft segment of the stepped shaft (03) and is provided with an electromagnet (10). The variable shaft diameter bearing seat device (08) includes a base fixing seat (0803) and multiple experimental components. The base fixing seat (0803) is slidably installed on the linear slide groove (111) and is provided with a pressure plate (080301). When the electromagnet (10) is energized, it attracts the base fixing seat (0803) so that the pressure plate (080301) presses against the platform of the base (11). The experimental assembly includes a bore sleeve (0802) for fixed installation on the base mounting base (0803) and an experimental bearing (05) installed therein, the size of each experimental bearing (05) being adapted to the corresponding stepped shaft segment. The base fixture (0803) can be positioned at any experimental position and the corresponding experimental components can be installed to support the corresponding shaft segment of the stepped shaft (03). The acceleration sensor (09) is installed on the base fixture (0803) and its detection end contacts the outer circumferential wall of the aperture sleeve (0802).

2. The modular multi-size bearing fault diagnosis experimental device according to claim 1, characterized in that, The base fixing seat (0803) is provided with several slots axially around its shaft through hole, and the outer periphery of the hole sleeve (0802) is provided with protrusions that correspond one-to-one with the slots, which are limited by snap-fit.

3. The modular multi-size bearing fault diagnosis experimental device according to claim 2, characterized in that, The base fixing seat (0803) is connected to a detachable clamping plate (0801) via a buckle (0804). The inner side of the clamping plate (0801) is provided with an elastic protrusion for pressing the protrusion of the aperture sleeve (0802) into the slot.

4. The modular multi-size bearing fault diagnosis experimental device according to claim 1, characterized in that, The bore sleeve (0802) is radially provided with a set screw (14) for locking the outer ring of the experimental bearing (05).

5. The modular multi-size bearing fault diagnosis experimental device according to claim 1, characterized in that, The stepped shaft (03) is connected to the output shaft of the variable frequency motor (01) mounted on the base (11) via a coupling (02).

6. The modular multi-size bearing fault diagnosis experimental device according to claim 5, characterized in that, The stepped shaft (03) is equipped with a pulley (06) and a gear (07) for connecting an external torque transmission system to simulate variable load conditions.

7. The modular multi-size bearing fault diagnosis experimental device according to claim 6, characterized in that, The stepped shaft (03) is fitted with a first bushing (13) to constrain the axial movement of the experimental bearing (05) and the gear (07).

8. The modular multi-size bearing fault diagnosis experimental device according to claim 7, characterized in that, The stepped shaft (03) is fitted with a second bushing (15) to constrain the axial movement of the bearing in the bearing seat (04) and the pulley (06).

9. The modular multi-size bearing fault diagnosis experimental device according to claim 1, characterized in that, The base (11) is detachably connected to the bottom plate (12), and the electromagnet (10) is detachably connected to the bottom plate (12).

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